<p>This study examined the relationship between social media usage and adolescents’ attitudes toward premarital sex in selected government secondary and preparatory schools in Bole Sub City, Addis Ababa, Ethiopia. Employing a quantitative approach with descriptive and correlational research designs, the study found that 76.8% of students used social media. Significant differences were observed in social media usage between male and female students, with males reporting higher usage. A moderate positive correlation (r = 0.423, <i>p</i> &lt; 0.001) was identified between social media usage and permissive premarital sexual attitudes. Additionally, differences in social media usage were found across grade levels, with higher usage among Grade 9 and Grade 12 students. Social media usage and sex significantly predicted adolescents’ premarital sexual attitudes, explaining 25.4% of the variance. The findings suggest that social media activities, including exposure to sexual content, influence adolescents’ attitudes toward premarital sex, highlighting the need for targeted digital literacy interventions in this context.</p>